feat: external table for cassandra #5114

Job	Run time
Build	2m 13s
Node.js Binding Tests	4m 31s
PG Protocol Tests	5m 51s
Python Binding Tests	5m 31s
Process Integration Tests (pytest)	1m 6s
SQL Logic Tests (postgres)	4m 33s
Service Integration Tests (SLT)	18m 5s
SQL Logic Tests (flightsql)	4m 0s
Lint and Format	2m 47s
Unit Tests	5m 27s
Snowflake Service Integration Tests (SLT::Snowflake)	5m 0s
	59m 4s

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